Elaboration of new ceramic membrane from spherical fly ash for microfiltration of rigid particle suspension and oil-in-water emulsion
Elaboration of new ceramic membrane from spherical fly ash for microfiltration of rigid particle suspension and oil-in-water emulsion
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DOI：
10.1016/j.desal.2012.11.008
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发表时间：
2013-02-15
期刊：
影响因子：
9.9
通讯作者：
Jiang, Lei
中科院分区：
文献类型：
--
作者：
Fang, Jing;Qin, Guotong;Jiang, Lei
球形粉煤灰陶瓷膜是近年来发展起来的一种新型陶瓷膜。它不仅是一种低成本的膜，而且由于原材料颗粒呈球形，理论上是一种低阻力膜。这种新型膜的实际过滤性能还未见报道。考察了该膜微滤刚性颗粒悬浮液和水包油型乳状液的渗透性能和抗污染性能。通过测定渗透通量、污染物截留率和膜污染阻力，研究了操作条件和进料性质的影响。结果表明，在0.10 MPa的低膜压下，连续运行10 h，刚性颗粒悬浮液和水包油乳状液的微滤通量分别达到2270 L m（-2）h（-1）和159 L m（-2）h（-1）。对刚性颗粒和油滴的截留率分别大于99%和95%。基于串联阻力模型和孔堵塞模型，分析了微滤过程中球形粉煤灰基膜的污染机理。分析结果表明，球形粉煤灰基膜在两种过滤过程中均表现出较低的膜污染阻力。球形粉煤灰基陶瓷膜在两种过滤过程中均表现出比其他无机膜更强的竞争力。(c)2012爱思唯尔有限公司版权所有。
Spherical-fly-ash-based membrane is a new kind of ceramic membrane which is recently developed. It is not only a low-cost but also a theoretically low resistance membrane due to the formal spherical raw particles. The factual filtration performance of this new membrane has not been reported. In this paper, the permeability and anti-fouling property of this new membrane for microfiltration of rigid particle suspension and oil-in-water emulsion were evaluated. The effects of operating conditions and feed properties were investigated by measurements of permeate flux, pollutant rejection, and membrane fouling resistances. The results revealed that after continuously running for 10 h without backwashing, high permeate flux of 2270 L m(-2) h(-1) and 159 L m(-2) h(-1) were obtained in the microfiltration of rigid particle suspension and oil-in-water emulsion at a low transmembrane pressure of 0.10 MPa, respectively. The rejection of rigid particles and oil-droplets were more than 99% and 95%. The fouling mechanisms of spherical-fly-ash-based membrane in the microfiltration were analyzed based on the resistance-in-series models and pore-blocking models. Analysis results showed that spherical-fly-ash-based membrane exhibited lower membrane fouling resistances in both filtration processes. Spherical-fly-ash-based ceramic membrane exhibited a higher competition comparing to the other available inorganic membranes in both filtration processes. (c) 2012 Elsevier B.V. All rights reserved.